Does it have backscroll yet? Without that it's kind of the wrong way around in what features it lacks.

Like, People who want to run every session in tmux (but don't care about using a tiling wm) don't need scrolling, tabs, or splits. People who want to run their terminals in i3 also don't want tabs or splits, but they do need scroll or else they have to duplicate effort on both sides just to get scrolling.